1995 Dodge Neon No spark no Fuel

I rebuilt the engine in my 95 dodge neon, After the rebuilt we started the engine without a problem it ran really well for 30 minutes at an idle. All of a sudden the rpms droped and the car shut off (just like if someone had turned off the key) I'm not getting a check engine light or oil pressure light. The only code I could get was a "recent battery disconnect" ( I no longer even get this) the timing belt is still turning and is in the correct position. I checked the fuel injectors and they arent spitting gas and the spark plugs wont spark. The key still turns over the engine. And I have replaced the Computer 3 times! I've gone as far as to test every wire in the car for a ground and power and double checked with a ohms meter. I have checked the relays ans fuses inside and outside the car nothing burnt and everything is functioning I have located the ASD relay and nothing is wrong with it. The only thing I found was there was no power from computer to the idle air control value/motor when I disconnected the sensor and tryed to start the car I still didnt get a check engine light Im comfused? I've tryed everything any ideas?